CONSOLIDATED BALANCE SHEETS - SCG (Parentheticals) - shares	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000	50,000,000
Common stock, shares authorized (in shares)	750,000,000	750,000,000	750,000,000
Common stock, shares outstanding (in shares)	316,919,782	288,470,244	291,712,925
SoCalGas
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares authorized (in shares)	11,000,000	11,000,000	11,000,000
Preferred stock, shares outstanding (in shares)	1,000,000	1,000,000	1,000,000
Common stock, shares authorized (in shares)	100,000,000	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	91,000,000	91,000,000	91,000,000